<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Document</title>
  </head>
  <body>
    <script>
      function Person() { }                 // 定义函数
      console.log(Person.prototype);        // 输出结果：{constructor: ƒ}
      console.log(typeof Person.prototype); // 输出结果：object
    </script>
  </body>
</html>